The musician and her motocross-champ husband were married in 2006 and welcomed Willow in June 2011.

“I have lived a lot of life in a very short time, and you get hardened a little bit — you get jaded, you build up walls. And when you see this little kid, and you get to watch them through infancy to toddler to little person, it’s amazing,” the singer previously told PEOPLE about motherhood.

“You see how you were. When you watch this bundle full of love and light that’s untarnished and untainted by heartache and any of the numerous things that change you, it’s very healing. It’s a miracle.”